Bowel Obstruction Signs in Baby
The short answer
Bowel obstruction is a medical emergency where something blocks the intestine, preventing food and gas from passing through. Key signs include bilious (green) vomiting, progressive abdominal distension, absence of stool and gas, severe abdominal pain, and the baby becoming increasingly unwell. If you suspect a bowel obstruction, go to the emergency department immediately.
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By Age
What to expect by age
Bowel obstruction in newborns can be caused by intestinal atresia, malrotation with volvulus, meconium ileus, or Hirschsprung disease. Bilious vomiting (green vomit) in a newborn is a surgical emergency until proven otherwise. Delayed passage of meconium beyond 48 hours of life should also raise concern.
Intussusception (one section of intestine telescoping into another) can cause obstruction. Signs include intermittent severe crying with legs drawn up, vomiting, lethargy between episodes, and eventually bloody "currant jelly" stools. An incarcerated inguinal hernia is another cause of obstruction at this age.
Intussusception peaks between 6 and 18 months. Foreign body ingestion becomes possible as babies put objects in their mouths. A swallowed object can cause obstruction if it gets stuck in the intestine. Any sudden onset of bilious vomiting and abdominal distension needs emergency evaluation.
Toddlers are at higher risk for foreign body ingestion causing obstruction. Adhesive bands from previous abdominal surgery can also cause obstruction. Severe constipation can occasionally mimic obstruction. The key distinguishing features of true obstruction are bilious vomiting, progressive distension, and complete absence of stool.
What Should You Do?
When to take action
- There is no "normal" version of bowel obstruction; any suspected obstruction is an emergency
- Your baby has persistent vomiting with abdominal distension and you are concerned
- Green (bilious) vomiting at any age
- Progressive abdominal distension with vomiting and no passage of stool or gas
- Intermittent severe abdominal pain with vomiting and lethargy
- A baby with a known hernia that becomes hard, painful, and cannot be pushed back in
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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Related Digestive Concerns
Signs of Intussusception in Babies
Intussusception is a serious but treatable condition where part of the intestine telescopes into itself, causing a blockage. The classic signs are sudden episodes of severe pain (baby screams and pulls legs up), vomiting, and eventually "currant jelly" stools (blood and mucus). It's most common between 6-18 months and requires immediate emergency care.
Malrotation and Volvulus Signs in Baby
Malrotation is a condition where the intestines did not rotate into their normal position during fetal development. Volvulus occurs when the intestine twists, cutting off blood supply, and is a life-threatening emergency. The hallmark sign is bilious (green) vomiting, especially in the first month of life. Any newborn with green vomiting needs immediate emergency evaluation.
My Baby Is Vomiting Green or Yellow (Bile)
Bilious (green or bright yellow) vomiting in a baby is a medical emergency until proven otherwise. While older children and adults occasionally vomit bile with prolonged vomiting, in infants, green vomiting can be a sign of a bowel obstruction such as malrotation with volvulus, which requires emergency surgery. If your baby vomits green or bright yellow fluid, seek immediate medical attention.
Strangulated Hernia Signs in Baby
A strangulated hernia occurs when tissue trapped in a hernia loses its blood supply, becoming a surgical emergency. Signs include a hernia bulge that becomes hard, tender, red or discolored, and cannot be pushed back in, along with vomiting, severe fussiness, and sometimes fever. If your baby's hernia becomes stuck, hard, or painful, go to the emergency department immediately.
My Baby's Belly Looks Swollen
A rounded, slightly protruding belly is completely normal in babies and toddlers due to immature abdominal muscles and their proportionally larger organs. However, if the belly becomes suddenly swollen, feels hard and tight, or is accompanied by pain, vomiting, or changes in bowel movements, it needs medical evaluation as it could signal gas buildup, constipation, or rarely, something more serious.
My Baby Has an Anal Fissure (Blood When Pooping)
A small streak of bright red blood on the surface of your baby's stool or on the diaper is most commonly caused by an anal fissure, which is a tiny tear in the skin around the anus from passing hard stool. Anal fissures are very common in babies and toddlers and usually heal on their own with simple measures like keeping stools soft. While this is rarely serious, any blood in your baby's stool should be mentioned to your pediatrician.